comptia network certification 2009 edition pdf

... 125–136 Network diagrams logical, 487 physical, 485–487 Network documentation, 561, 565 Network driver interface specification (NDIS) boundary layer, 255 Network fundamentals history on networking ... communications, 5–14 logical networking topologies, 14–24 network types, 31–35 physical network models, 24–30 Network hijacking and modification, 213–214 protecting, 215 Network IDs, 299–305 class ... 302 Network intrusion detection system (NIDS) network design with, 389–392 vs. NIPS, 388–389 Network intrusion protection system (NIPS) network design with, 389–392 vs. NIDS, 388–389 Network...

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... Trang 2CompTIA Network+ Certification Study Guide Trang 3This page intentionally left blankTrang 4CompTIA Network+ Certification Study Guide Exam N10-004 2E ... Publishing, Inc Elsevier, Inc 30 Corporate Drive Burlington, MA 01803 CompTIA Network+ Certification Study Guide Copyright © 2009 by Elsevier, Inc All rights reserved Printed in the United States ... Cataloging-in-Publication Data CompTIA Network+ certification study guide / Robert J Shimonski [et al.] — 2nd ed p cm Includes index ISBN 978-1-59749-429-8 (pbk : alk paper) 1 Computer networks—Examinations—Study...

Ngày tải lên: 04/07/2014, 13:20

... into the types of cabling you’ll find on networks and the Network exam. As we’ve discussed, there are three types of physical media that can be used on a network: coaxial cable, twisted-pair cable, ... 3 is the minimum grade of cable that supports networking, but it is not the best choice for networks. CAT3 is a voice-grade cable used in phone networks, and its only real benefit beyond being ... with networking, or often forgotten. Nevertheless, elements such as wireless technologies, FireWire, and transceivers are impor- tant to networking. Such media is not only covered on the Network...

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... external transceiver type Trang 2On networks that used 10Base2 and 10Base5 media, transceivers are used to connect to the cable and communicate with the network 10Base5 networks use a device called ... allows the workstation to connect to the network using an AUI cable When a MAU and AUI cable are used on a 10Base5 network, the onboard trans-ceiver of the network card isn’t used Instead, the transtrans-ceiver ... through the AUI cable from the network adapter card on the workstation On 10Base2 networks, no more than 30 transceiv-ers can be connected to any segment, while on 10Base5 networks no more than 100...

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... for controlling traffic and applying security features NETworK dEvICES Network devices are components of a network that are required if the network is to grow, function, or provide certain functionality ... rarely used on today’s networks In discussing these devices, we’ll tell you about their purpose, features, and functions on a network hEAd oF ThE ClASS… oSI and Network devices Network devices can ... now found incorporated in other network devices, such as hubs and switches. Trang 10Network Devices 105Network segmentation A bridge is a simple way to accomplish network segmentation Placing a...

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... Two Networking Technologies Connected via a Windows Server 2008 Router. Trang 2Concepts of ConvergenceOver the years, a number of network devices have become obsolete or less nec-essary to a network ... eXchange (PBX) or ISDN network router An NT2 device provides an S inter-face and accepts a T interinter-face from an NT1 NT2 usually handles data link and network layer functions in network with multiple ... expensive to replace a network card on a mainframe, it was often cheaper to just get a router with a Token Ring interface as well as an Ethernet one, so many Token Ring networks exist as of...

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... T3 line, which provides speeds of 44.736 Mbps Network Interface Cards Network interface cards, also referred to as network adapter cards or sim-ply network cards, are the key components that allow ... the network Installed on work-stations, servers, printers, and other network devices, it provides an inter-face to the network that allows data to be transmitted and received across the network ... address must be unique on each network card on a network You may wonder how a manufacturer can ensure uniqueness among all the network cards in the world No doubt there are network cards that have the...

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... CHAPTER 3: Network Devices 126 Firewalls A firewall protects a secure internal network from a public insecure network. Firewalls are devices or software that ... the next level by further isolating the internal network from the public network. An addi- tional screening router is placed between the internal network and the fire- wall proxy server. The internal ... In addition, the internal network is protected by a firewall from both the external network and the systems in the DMZ. FIGURE 3.9 A Layered DMZ Implementation. Network Devices 131 Because...

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... allows the network architects to reuse networking equipment as required to address the networking realities of each environment For example, it is possible to move part or all of a network from ... secure from daily activities Roaming A wireless network access zone is an area of wireless network coverage Compared to traditional wire-based networks, a wireless user is not required to be ... 5: Wireless Networking 174 When discussing physical roaming, we would include both the movement of a user within a single AP’s wireless network access zone or within the combined network access...

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... understood to pass the wireless objectives on the Network certification exam overview of wireless Communication in a wireless Network Wireless networks, like their wired counterparts, rely on ... Protocol (WAP) networks and wireless local area network (WLAN) based on the Institute of Electrical and Electronic Engineers (IEEE) 802.11 speci-fication These are not the only wireless networking ... in the link wIrElESS NETworK CoNCEpTS This section covers some of the most popular wireless technologies used today for wireless networking In the past 5 years, two wireless network technologies...

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... wireless network to sniff and capture network traffic. This network traffic can reveal a lot of informa- tion about the network and the company that uses it. For example, looking at the network ... avenues into a wireless network. The first step in attacking a wireless network involves finding a network to attack. The most popular software developed to identify wireless networks was NetStumbler ... any of the aforementioned network sniffing tools, an attacker can easily monitor the unencrypted network. Figure 5.13 shows a network sniff of the traffic on a wireless network. From this session,...

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... Chapte r Network Fundamentals E x am objecti ves in t h is c h apte r What is a Network? Logical Networking Topologies Physical Networking models Network Types 14 24 31 Introduction Networks ... a network technician and to pass the CompTIA Network+ exam We cover network models such as centralized and decentralized, the differences between a local area network (LAN) and a wide area network ... the basic aspects of a network remain the same What Is an Internetwork? Just as computers can be connected together, so can networks An internetwork exists when two or more networks that are connected...

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... using it Network Monitors and Protocol Analyzers Network monitors and protocol analyzers monitor traffic on the network and display the packets that have been transmitted across the network. €If ... transmitted across the network, the problem may lie with that particular packet type Because the network monitor enables you to view the contents of all packets on the network, in many cases, ... location possible – it is a law of networking that when something breaks, it will be in the worst possible place) Wire Map Tester A wire map tester is generally used on networks that use twisted-pair...

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... Damage and Defense Switching on Networks In terms of devices that provide network connectivity, switches have become the future of networking Today’s computer networks have to support the combination ... travels across the network When data loops endlessly around the network in this way, it eats up the available bandwidth and can affect network performance Not only can computers on the network experience ... business, and now wants you to connect the two networks together Your company’s existing network is twice the size of the new network To get these two networks connected together, which of the following...

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... Model and Networking Protocols E x am objecti ves in t h is c h apte r The OSI Model� The DoD Networking Model� Networking Protocols� 237 257 265 Introduction To prepare for the CompTIA Network ... users of the network will be unable to use the network Flooding the wireless network with transmissions can prevent other devices from utilizing the resources, making the wireless network inaccessible ... Wireless Networking ■■ ■■ ■■ ■■ ■■ ■■ Many wireless networks that use the same frequency within a small space can easily cause network disruptions and even denial of service (DoS) for valid network...

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... applications in its network, but is not connecting its network to the global Internet, the IP addresses used not have to be globally unique A network of this type is called a private network, and the ... it for the Network+ exam NAT will be covered later in this chapter Renumbering If using NAT, no readdressing of privately addressed networks is necessary to access public networks Networks Treating ... organization Only networks that interface with public networks such as the Internet need public addresses Using public addresses on the outside and private addresses for inside networks is very...

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... new routers or network links are added to a network, is a routing loop, which occurs in this fashion: A source computer on Network A is trying to reach a destination computer on Network C The ... on the network number of the destination address Every computer has a table of network numbers, known as a routing table If there is an entry in the routing table for the destination network ... flowing on 601 602 Chapter 12 : ╇ Network Troubleshooting Methodology your network, especially when you’re troubleshooting IP connectivity issues on a large network This allows you to compare...

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... change Q: What types of networks are most likely to use OSPF instead of RIP? A: Large enterprise networks and very large internetworks, such as corporate campuses and global networks Microsoft documentation ... with the physical cabling and network devices that connect you to the network Â� Troubleshooting often begins at the physical layer, where you need to determine if your network cards, hubs, and cabling ... possibility of loops on a switched or bridged network Â� Troubleshooting the Network Layer ■■ ■■ ■■ A great deal of your troubleshooting time will be spent at the network layer, as this actually controls...

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... Computer Network local -network protocols RFC894 Standard for the transmission of IP datagrams over Ethernet networks RFC895 Standard for the transmission of IP datagrams over experimental Ethernet networks ... the network from interfering with one another when trying to transmit; if they do, a collision occurs To reduce collisions, CSMA/CD devices listen to the network before transmitting If the network ... onto the network This ensures that workstations will not simultaneously communicate on the network, as in the CSMA/CD method 802.11 Wireless The IEEE 802.11 standard addresses wireless networking...

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... dissimilar networks so that both are able to communicate For example, if your Ethernet network is to be connected to a Token Ring network, you will need to have a gateway so that hosts in the two networks ... a legitimate solution 11 As a network technician, you are asked to deploy a network load balancer You need to configure a network load balancer on the 10.0.10.0/8 network for the Web development ... administrator of a small business network You notice that as you add workstations to the network over time the speed of the network decreases, what devices would you replace in your network with what other...

Ngày tải lên: 04/07/2014, 13:21